8. An 18-wheeler, moving with an initial velocity is 20 m/s, decelerates at 2.5 m/s? How much distance does it take the truck
to stop?
a. d = 4m
C. d = 80m
b. d = 20m
d. d = 140m

What kind of simple machine is a catapult?

In the circuit, the switch s has been open for a long time and r = 125 kohm. it is then suddenly closed. (a) determine the time constant before the switch is closed. s (b) determine the time constant after the switch is closed. _ s (c) let the switch be closed at t = 0. find the current in the switch as a function of time. (use t for time. express your answer in milliamps and seconds.) i(t) =_

1kg of water needs to recieve 4200j of energy to go from 90 degrees to 91 degrees. what is the specific heat capacity of water? what are the units?